Band-saw connection



(No Model.)

11. N. GALE & W. LJWRIGHT.

Band Saw Connection. N0. 230,934. Patented Aug. I0, 1880.

Units Fries.

HERBERT N. GALE AND VVILBUR L. WRIGHT, 0F BRISTOL, CONNECTICUT.

BAN D-SAW CONNECTION.

SPECIFICATION forming part of Letters Patent No. 230,934, dated August10, 1880,

Application filed April 21, 1880.

To all whom it may concern:

Be it known that we, HERBERT N. GALE and WILBUR L. WRIGHT, both ofBristol, in the county of Hartford and State of Connecticut, haveinvented certain new and useful Improvements in Connections forBand-Saws, of which the following is a specification.

()ur invention relates to improvements in band-saws in which there is aneye and tongue in the adjoining ends of the saw; and the object of theinvention is to furnish a cheap, strong, and convenient fastening forconnecting and disconnecting the ends of a band-saw in such manner asnotto interfere with the working qualities of the saw.

We attain this objectby the mechauisniillustrated in the accompanyingdrawings, in which Figure 1 is a side elevation of the connected endsofa band saw. Fig. 2 is a longitudinal section of the same on lineacacot' Fig. 1. Fig. 3 is a sideelevation with the ends disconnected.Fig. 4 is an edge view of the back of the saw. Fig. 5 is a sideelevation, showing the opposite side of the connected ends, and designedparticularly to show the thin tooth at the lap. Fig. 6 is an edge view,showing the mannerof detaching and attaching the ends. Fig. 7 is an edgeview, showing particularly the set of the thin tooth. Fig. 8 is asectional view on line 3 g of Fig. 1. Fig. 9 is a side view, showing aslight modification in the form of the ends, and Fig. 10 is a sectionalview of the same on the line z of Fig. 9.

Similar letters referto similarparts throughout the several views.

The thickness of the saw in the drawings is represented asproportionally larger than it should be in practice, in order to avoidcrowding the lines.

WVe design to make the ends in detached and separate pieces from the sawproper, and to afterward connect them by soldering, or rather let theuser so connect them. In this way we can make them of any suitable ordesired metal-as, for instance, soft steel or ironso that they will notbreak; but they may if desired, (so far as part of our invention isconcerned,) he formed in one and the same piece with the saw proper,which, if too (No model.)

hard to bear use when reduced by forming the clasp, may have itsconnecting ends annealed.

in each piece A A we form an eye, a, which is widest at the farthestpoint from the lap and narrow at the end nearest the lap. We also form atongue, b, of corresponding form that is, with a head and narrow neckfitted to the eye. This tongue is reduced in thickness upon the twosides of its broad head, as shown on the tongue of the lower one of thepieces A A, in Fig. 3, while the body of the tongue is reduced inthickness upon its opposite side, as shown by the upper piece in saidfigure. The end of each piece A is also reduced in thickness its wholewidth for a short distance, equal to theintended length oi'one tooth,from which reduced portion a groove, 0, of a width to receive the bodyor neck of the tongue, eX- tends inward to the eye, all as shown in Fig.3. The opposite side of the pieces A A is also recessed out upon eachsideot' the narrow portion of its'eye. These reductions or depressionsextend about half-way through the original thickness, so that theremaining thin portions are about one-half the thickness of the metalinthe body of the pieces A A. Both of the ends to be connected aremadejust, alike, exceptin the teeth, which shouldnot beformed untilafter the ends have been connected toget-her.

In order to connect the pieces they are first lapped at the ends untilthe heads of the tongues b I) are by the side of the largest parts ofthe eyes a a. The heads of the tongues are then forced into and throughthe eyes by springing the tongues, and while they are so sprung thepieces are pulled away from each other so as to draw the heads into eyesand into the position represented in Figs. 1, 2, 4, and 5, when theparts are locked together in such manner that they will not becomedetached in the ordinary uses of a band-saw.

In order to detach the ends the strain upon the saw is released, theabutting shoulders (shown in Fi 4) are slipped by each other byspringing the metal and then crowding said shoulders away from eachother a little farther than the position represented in Fig. 6, when thetongues can be removed from the eyes and the parts detached.

One important feature in this connection is that there is a tonguerunning by the abutting shoulders at the junction of the saw, so that ifthe ends of the saw should spring outward at this point the tongues,which are still secured to the eyes and upon each side of the lap, willhit the wood and guide the shoulders by it without catching.

After the ends are joined the teeth are formed, taking care that thefront sides of the teeth come opposite the abutting shoulders on thesaw, the saw being reduced in thickness at the lap for the length of onetooth and the whole width of the saw.

In order to pre ent catching and making a split tooth, the point of thetooth (or rather the whole tooth on one-halfot' the lap) is removed, asshown in Fig. 5, and the remaining thin tooth d is, in setting the saw,bent toward and over the side having the point removed, as shown in Fig.7.

If desired, instead of making the reduced portions or depressions by thesides of the eyes and on the heads of the tongues flat, so as to formthe rabbeted form of connection, as shown in cross-section, Fig. 8, thesame may be beveled so as to form a dovetail, as shown in Figs. 9 and10.

If desired, for small and narrow saws the teeth may be omitted in theend or connecting pieces, which would not seriously affect the operationof the saw.

Another important result of our construction is that the abuttingshoulders and the locked tongues prevent the saw from deflectingedgcwise at the junction-or, in other words, the back of the saw upon bothsides of the connected ends is in the same plane, whereby it is adaptedfor working against a stationary guide to keep the saw on its wheels.

We claim as our invention 1. In a band-saw connection, one of the sawends formed .with the eye a. enlarged at one end, and with a narrow neckat the opposite end, the narrow neck being Wider upon one side of theblade than it is upon the other, in combination with the other saw endhaving a headed tongue, the head of which is made wider upon one side ofthe blade than it is upon the other, and titted to and engaging with thesaid eye, substantially as described, and for the purpose specified.

2. In a band-saw connection, the ends made with the eyes and tongues andprovided with a groove upon one side which extends from the eye to theshoulder near the neck of the tongue, the neck of the tongue also beingreduced in thickness and fitted to said groove, substantially asdescribed, and for the purpose specified.

3. In a band-saw connection having reduced portions lapping by eachother, the thin tooth d, with its front end located nearly opposite tothe abutting shoulders of the connected pieces, and with said tooth setor bent over toward the side from which the companion thin tooth hasbeen removed, substantially as described, and for the purpose specified.

4. In a band-saw connection, the ends halved for their whole width for ashort distance, ter minated by the abrupt transverse shoulder, andlapped one upon the other, and provided also with an eye and tongue eachfor securing the ends together at two points upon opposite sides of thehalved and lapped portion and outside of the two transverse shoulders,substantially as described, and for the purpose specified.

5. In a band-saw connection, the transverse abutting shoulders and theeyes and tongues for securing the connected ends together at two points,one of which is upon one side of said transverse abutting shoulders, andthe other upon the opposite side, substantially as described, and forthe purpose specified.

' HERBERT N. GALE.

XVILBUR L. WRIGHT. Witnesses:

JAMES SHEPARD, J OHN EDWARDS, Jr.

